Is it permissible to consume protein made from "hemp" herb – which is available in sports stores in Britain and does not contain (THC) – as a natural source of energy?

"Hemp is a plant cultivated by some countries for its strong fibers, and its cultivation is prohibited in most due to the possibility of extracting narcotic substances from it. Its active ingredient is 'Tetrahydrocannabinol' (THC), which affects the brain and nervous system. This active ingredient is not present in the non-flowering or non-fruiting leaves of hemp, nor in its seeds. The Single Convention on Narcotic Drugs of 1961 prohibited its cultivation except for small quantities for scientific purposes. It defined 'cannabis plant' as any plant of the genus Cannabis, and 'cannabis' as its flowering or fruiting tops, while excluding its leaves not accompanied by tops and its seeds. Based on this, there is no harm in consuming protein extracted from non-fruiting hemp leaves or its seeds if it is free of THC, and provided that it does not have a negative effect on the body."